CN102326050A - Coupling alignment apparatus and method - Google Patents

Coupling alignment apparatus and method Download PDF

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Publication number
CN102326050A
CN102326050A CN2009801572081A CN200980157208A CN102326050A CN 102326050 A CN102326050 A CN 102326050A CN 2009801572081 A CN2009801572081 A CN 2009801572081A CN 200980157208 A CN200980157208 A CN 200980157208A CN 102326050 A CN102326050 A CN 102326050A
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connection element
image
acquisition equipment
connection
measurement mechanism
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CN2009801572081A
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CN102326050B (en
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P·C·帕维尔斯基
N·W·科塔米
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Caterpillar Inc
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Caterpillar Inc
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/27Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G01B11/272Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

An apparatus for axially aligning a first coupling member and a second coupling member that can be connected so as to form a rotating assembly. The apparatus includes a measurement arrangement configured to be mounted onto the first coupling member and to be rotated therewith. The measurement arrangement includes an emitter arrangement configured to emit first and second signals in the direction of the second coupling member so as to cause at least a portion of said first and second signals to be reflected by the second coupling member. The measurement apparatus further has a capture arrangement configured to capture at least a portion of the first and second reflected signals. The apparatus includes a control arrangement configured to determine an offset in axial alignment between the first and second coupling member based on at least the first and second reflected signals.

Description

Connect aligning equipment and method
Technical field
The present invention relates to be used to aim at the method and apparatus of a plurality of connection elements (making a plurality of connection element alinements).More specifically but not exclusively, the present invention relates to aim at two connection elements that are used to form rotatable coupling assembly.
Background technology
When prime mover (like internal combustion engine, turbine or motor) is used to driven device (like generator, impeller drive shaft, compressor or variator) when power is provided, the connection that needs certain form is to be connected to the rotation output of prime mover the rotatable input of driven device.In the ideal case, when stream oriented device is in their following time of normal operation, the center line of the rotation output of prime mover will be coaxial with the center line of the rotatable input of driven device.For the situation of most of big machineries, situation about connecting in the flexibility of not utilizing certain form be issued to enough near the state of ideal situation with prevent machine impaired be impossible.Even when using flexible the connection, also hope to connect the life-span to prolong near desirable alignment, prevent reversing or the linear oscillator problem in the machinery, and reduce by because of connecting the energy loss amount that the crooked heat that is produced causes.
People's such as Nower United States Patent (USP) 5,684,578 discloses a kind of laser alignment head system, and it has two laser heads of having replaced more traditional mechanical probe.A laser head scans two by first axle in the coupling spindle, and second axle of second laser head scanning.Then, deal with data is to confirm any mistake accurate (misalignment) between the diaxon.But this structure is often expensive, and be difficult near by draw bail in use, wherein any radial and axial gap all is not enough to hold this numerous stupid laser head system usually.
The traditional solution of this problem is to make to be positioned at some on-rotatably moving part aligning that connects both sides, and the tight manufacturing tolerance in the dependence parts is guaranteed the aligning of rotary part.There are two intrinsic problems in this method.First problem is, though on-rotatably moving part to punctual it also need to reach processing and the assembling tolerance of dozens of parts all very tight can not cause rotary part to lose unacceptable amount that certainly reaches so that their gross tolerance is added up.Second problem be, it can not provide correct in pre-check.This treats that at two the manufacturing location of connection element and their assembling place are particularly unimportant simultaneously.For example; If manufacturers of engines has changed the assembler who squints and fail to give notice genset (" genset ") that allows on the bell housing dignity; Even then the assembler of genset continuation is with the previous aligning that has produced the same way as execution on-rotatably moving part that can accept the result, the genset of after said change, producing also possibly can't have suitable rotary part and aim at.
Summary of the invention
In first aspect; A kind of axially aligned method of first and second connection elements that is used for making rotating component is disclosed; Comprise with first orientation and settle rotating component; And guide first signal section from sender unit towards second coupling arrangement, the signal section of winning is reflected from second connection element.Catch first image with image capture apparatus, wherein said first image comprises at least a portion of second connection element and first signal section that is reflected.Settle rotating component with second orientation then, and guide the secondary signal part, make said secondary signal part be reflected from second connection element from sender unit towards second connection element.Catch second image with image capture apparatus, said second image comprises at least a portion of second connection element and the secondary signal part that is reflected.Generation data set; Wherein said data set is at least based on the relative position of said first and second connection elements of said first and second graphical representations, and confirms the journal offset between first and second connection elements based on the difference in the determined said data that generated.
In second aspect; A kind of measurement mechanism that is used to make first and second connection elements aligning that forms rotatable device is disclosed; Comprise sender unit and image capture apparatus; Said sender unit is configured to guide a plurality of signal sections to reflect said a plurality of signal section from second connection element towards second connection element, and said image capture apparatus is configured to catch a plurality of images in each different rotation orientation of rotatable coupling assembly.Said a plurality of image comprises at least a portion of second connection element and at least some in said a plurality of signal section respectively.In said sender unit and the image capture apparatus at least one is configured to and can together rotates with said coupling assembly.Said device also comprises control device, and this control device is configured to confirm any difference between said a plurality of images and confirms the journal offset between said first and second connection elements based on determined difference.
Description of drawings
Fig. 1 illustrates the schematic side elevation of coupling assembly, and it has an embodiment according to connection alignment tools of the present invention.
Fig. 2 illustrates the synoptic diagram of the connection alignment tools of Fig. 1.
Fig. 3 illustrates the diagrammatic plan view of the coupling assembly of Fig. 1.
Fig. 4 A-4C illustrates has the diagram that accurate connection element is lost in skew.
Fig. 5 A-5C illustrates the diagram of the connection element with angular misalignment.
Embodiment
Referring to Fig. 1, schematic coupling assembly 10 shown in it.Coupling assembly 10 can comprise first connection element 12 and second connection element 14.Coupling assembly 10 can be represented arbitrarily suitable connection, for example prime mover (like internal combustion engine, turbine or motor) and by the connection between the driver part (like generator, pump or variator).With regard to the object of the invention, first and second connection elements 12,14 can connect for example insertion-spigot-and-socket connection, splined, flange connection, Bolt Connection etc. with suitable arbitrarily arrangement.Flexible connection part 16 can be between first and second connection elements 12, accurate to allow first and second connection element 12, mistake between 14 between 14.Said flexible connection part can for example comprise elastomer member, mechanical spring or tprque convertor.
Coupling assembly 10 can be surrounded by connecting rack 11 at least in part, direct or indirect support to be provided to coupling assembly and/or the safety curtain that protects coupling assembly 10 is provided.In one embodiment, connecting rack is for surrounding the cage structure of coupling assembly 10.For clarity sake, in Fig. 1, only show some part of connecting rack 11.
First connection element 12 can have first rotation 13,, and second connection element can have second rotation 15.In the graphical representation of exemplary of Fig. 1, first and second rotations do not overlap, thereby demonstrate the accurate A1 of skew mistake, and this skew is lost and will definitely be regulated by flexible connection part 16 at least in part and/or temporarily.Losing accurate problem will more in depth discuss in the back.
Fig. 2 illustrates the embodiment of alignment tools 20.In one embodiment, said alignment tools can comprise the overall measurement mechanism of representing with Reference numeral 22, control device and the power source of totally representing with Reference numeral 24 40.Measurement mechanism 22 can be two separated portions with control device 24, but they also can be closely interconnected and/or have a common means.Power source 40 can be any suitable source that is positioned at any appropriate location, and can be shared or independent for measurement mechanism 22 and control device 24.
In one embodiment, measurement mechanism 22 can comprise emitter 26 and acquisition equipment 28.Emitter 26 can be the signal source of one or more arbitrarily suitable kinds, and can for example launch at least a light signal, other electromagnetic signal or sound signal.Coherent source such as laser or laser diode are preferably, to obtain signal clearly.
Acquisition equipment 28 can be configured to catch the image relevant with at least a portion of second connection element 14 and/or catch the signal that is sent by emitter 26 directly or indirectly.Acquisition equipment 28 can comprise single or a plurality of capture devices.In one embodiment, acquisition equipment 28 comprises at least one camera.
In one embodiment, emitter 26 all is installed on first connection element 12 with acquisition equipment 28.
In one embodiment, emitter 26 can be configured to pass optical lens 32 and send light beams 30 with side direction this light beam that scatters.The light beam that side direction is scattered will begin to be known as optical plane 34 from this.
In one embodiment, at least one surface of optical lens 32 can have through etched cross hatch (reticulate pattern, cross-hatching) layout.
Emitter 26 and/or optical lens 32 can so be provided with, and make said optical plane point to second connection element 14 substantially.In one embodiment, optical plane 34 points to second connection element 14, if making not exist basically between first and second connection elements 12 and 14 loses standard, then the angle between the optical plane 34 and second rotation 15 will be the right angle basically.At least a portion of optical plane 34 can be by 14 reflections of second coupling part.Acquisition equipment 28 so is provided with, make its catch optical plane from second coupling part with respect to optical plane 34 at least a portion with angle (α 1) reflection.What in other words, acquisition equipment 28 can be caught the signal that is reflected becomes at least a portion of inclination angle (α 1) with respect to its sense before being reflected.
Acquisition equipment 28 can so be provided with respect to emitter 26, makes to realize suitable angle [alpha] nShould be appreciated that bigger angle [alpha] can provide better sharpness, still preferred less angle [alpha] when space constraint is a problem.
Measurement mechanism 22 also can comprise locating device 42, and it is configured to the information that provides relevant with respect to the rotation of first connection element with at least a portion of second connection element.In one embodiment, locating device 42 can comprise diaxon or three direct current accelerometer and/or gyroscope.
Control device 24 can comprise electronic processing unit 44 and communication structure 46.Any parts of control device 24 can preferably be positioned on second connection element or separation with it like institute.Communication structure 46 can comprise wired and radio parts, and can be connected with the various piece of measurement with control device 22,24.In one embodiment, communication structure 46 can comprise the CAN bus.In one embodiment, communication structure 46 can comprise the Zigbee wireless communication line.
Industrial applicability
In set-up procedure or assemble at first after the coupling assembly 10, first and second coupling parts 12,14 can not be in the preferred alignment state.In one example, two coupling parts 12,14 can demonstrate skew and lose standard, and wherein their rotation extends parallel to each other basically but do not overlap.In another example, two coupling parts 12,14 also can demonstrate angular misalignment, and wherein two rotations extend each other not parallelly.In the 3rd example, two coupling parts 12,14 can demonstrate skew and angular misalignment simultaneously.
The exemplary method of operating of an embodiment of alignment tools 20 will be described below in more detail.
Emitter 26 (in this particular example, being light source), optical lens 32 and acquisition equipment 28 are attached on first connection element 12, make that when emitter activated optical plane 34 arrives second connection element 14.Near that the part of no show second connection element 14 of optical plane can arrive the coupling assembly 10 or coupling assembly 10 other parts, for example connecting rack 10 or substrate surface.
When looked in the position from optical plane 34 as among Fig. 3 A, the position that light arrives other object formed a continuous line (X).But, as acquisition equipment 28 that kind when the low-angle shown in Fig. 3 B is looked, said line splitting becomes a series of sections (X 1, X 2, X 3, X 4, X 5, X 6, X 7), these sections have different angle [alpha] based on the distance of the object that blocks opticpath with shape, for example α 1 and α 2.Be positioned at the convention of the over top of acquisition equipment 28 according to emitter 26, see that in the image of acquisition equipment line X leans on down more, it is far away more that acquisition equipment 28 is left on the surface of then reflecting said line.Under the discontiguous each other situation of said object, each line segment does not link to each other.Therefore, the line segment X on second connection element 14 1Formation had the little curve of obvious end points, because it is different to the distance of emitter 26 to block the next object of optical plane 34.
In one approach, activate alignment tools 20, and make first and second connection elements 12,14 rotate a complete circle or at least a portion of a circle lentamente.In a plurality of moment during turn-taking, electronic processing unit 44 sends signal through communication structure 46 to acquisition equipment 28.Acquisition equipment 28 can be caught the first image P1 at first relative position of first and second connection elements 12 and 14 a, and can catch the second image P2 at second relative position of first and second connection elements 12 and 14 in later phases aSaid image sends to electronic processing unit 44 together with the rotation position information that comes self locating device 42 through communication structure 46.
Acquisition equipment 28 has among the embodiment of a plurality of capture devices therein, can activate alignment tools 20 and send signal through communication structure 46 to acquisition equipment 28.Acquisition equipment 28 can be from catching the first and second image P1 with respect to the diverse location of second connection element 14 aAnd P2 aSaid image sends to electronic processing unit 44 through communication structure 46.
In one embodiment, when first and second connection elements 12 and 14 relative to each other are in same orientation, can obtain two image P1 aAnd P1 iCatching the first image P1 aEmitter 26 can activate during this time, and is catching the second image P1 iEmitter can not activate during this time, and is perhaps good conversely.The first and second image P1 aAnd P1 iBetween by pixel subtract each other (pixel by pixel subtraction), as from the second image P1 bDeduct the first image P1 by pixel a(perhaps conversely) can remove light (the line segment X except being reflected from the result 1-7) in addition at least a portion or all the elements basically.
Can to the every pair of image calculation represent on second connection element 14 line segment with respect to fixing vertically and the parameter of the position of horizontal reference.In one embodiment, said parameter can be for example based on line segment X 1The position of end points.Through observing the variation of these values, can confirm of linearity and the angular deflection of first connection element 12 with respect to second connection element 14.
In one embodiment, said method comprises based on the amount of light of neighbor in the given file to be confirmed the vertical position of the point on the line segment and/or makes said vertical position more accurate, and utilizes it to improve linear deflection and calculate.The line that is formed by the light beam that arrives object will be wideer than a pixel that has perpendicular to the normal energy distribution of said line.Bright level through measuring in the file bright pixel and same file meta be the bright level of several neighbors of side and below on it, and result and normal distribution curve are mated, and can carry out the sub-pix of the vertical position of this part of line segment and estimate.The variation of the reflectivity of second connection element 14 will cause the result of any given file to depart from physical location.But the variation of reflectivity also can be considered at random with normal distribution, thus the line segment X that names a person for a particular job through high-high brightness 1Carrying out least square curve fit to oval (being quadratic polynomial) will cause line segment X 1The height of the vertical position of end points is estimated accurately.Utilize these points in the above-mentioned measurement can improve in the measuring accuracy of each measurement point from the distance at the center of the lip-deep emitter 26 of first connection element 12 and/or acquisition equipment 28 to second connection elements 14.Known said distance (d) must change on sinusoid ground along with measurement point rotates, and therefore can carry out the least square fitting of all distances (d) value, and this provides extra improvement for estimation.Specify the turned position of any 0 and 90 degree, can provide vertically and the linear deflection of level.
Can use arbitrarily suitable point as reference point to be used for any calculating observation, judgement etc.In the illustrative methods below, reference point can be considered to datum line R 1And/or R 2
Fig. 4 A-4C illustrates the result of second connection element 14 with respect to the linear deflection of first connection element 12.Fig. 4 A is illustrated in second connection element 14 that when the immediate sidepiece in the outside that attaches the part that acquisition equipment 28 is housed of second connection element 14 and first connection element 12 is looked, it will be appreciated that.Fig. 4 B is illustrated in second connection element 14 that when Fig. 4 A looks with turning 90 degrees, it will be appreciated that, Fig. 4 C be illustrated in from Fig. 4 A turnback second connection element 14 that it will be appreciated that when looking.In all three Fig. 4 A-4C, datum line R 1Be in the same position in the visual field of acquisition equipment 28.For simplicity, suppose datum line R 1Represent the bottom in the visual field.It should be noted that from datum line to line segment X 1The distance of end points is maximum in Fig. 4 A, wherein second connection element 14 attach acquisition equipment 28 is housed sidepiece near the outside of first connection element 12.On the contrary, said distance is minimum in Fig. 4 C, wherein second connection element 14 acquisition equipment 28 is housed from attaching of first connection element 12 sidepiece farthest.It should be noted that line segment X in addition 1Horizontal range between the end points is maximum in Fig. 4 A, and is minimum in Fig. 4 B.
Fig. 5 A-5C illustrates the result of second connection element 14 with respect to the angular deflection of first connection element 12.Fig. 5 A is illustrated in from second connection element 14 and looks with respect to vertical datum line R 2 Second connection element 14 that sidepiece with maximum positive degree it will be appreciated that when looking.For the sake of simplicity, suppose datum line R 2Be in the center in the visual field of acquisition equipment 28.Fig. 5 B is illustrated in second connection element 14 that when Fig. 5 A looks with turning 90 degrees, it will be appreciated that, Fig. 5 C be illustrated in from Fig. 5 A turnback second connection element 14 that it will be appreciated that when looking.It should be noted that from line segment X 1Left end point to datum line R 2Distance maximum in Fig. 5 A, minimum in Fig. 5 C, and from line segment X 1Right endpoint to datum line R 2Distance minimum in Fig. 5 A, maximum in Fig. 5 C.
In one embodiment, datum line R 1, R 2With line segment X 1End points between distance can through number respectively go out these points vertically apart from the image bottom with flatly calculate apart from the pixel quantity of picture centre line.
In one embodiment, can use Bayes's (Bayesian) method and consider, to improve estimation linear and angular deflection from obtainable all information of all images that during the complete rotation of first connection element 12 and second connection element 14, obtains.
In one embodiment, said method comprises based on geometric configuration and curve fitting and confirms the angle of axle and/or make this angle more accurate.Form the plane wedge from the light of optical lens 32 projections; Therefore; The cylinder of second connection element 14 forms an ellipse to the intercepting of light beam; Its minor semi-axis equals the radius (r) of second connection element 14, and major semi-axis equals the cosine of said radius divided by the angle (alpha) between the cross section of the optical plane and second connection element 14.Utilize projective geometry, can confirm accurately what kind of given ellipse is when any vantage point is looked.It should be noted that oval aphylactic map projection is still ellipse.Why Here it is can be independent of the reason of the curve fitting that the calculating of in this paragraph, describing carries out describing in the paragraph formerly.The required variable of said calculating is the angle (beta) between observation point and the plane that comprises known line segment; Distance from the observation point to the elliptical center (d); This distance is defined by the physical arrangement of system, and is provided as from the accurate estimated value of the height of previous calculating.Therefore, can utilize least square method at any measurement point to line segment X 1On be observed a little and carry out curve fitting.Known said measurement is that carry out the position from the accurate circle, so can in all are measured, carry out least square fitting to each variable, to obtain angle alpha with high precision and with respect to the rotation of any 0 degree point.Therefore, can provide vertically and the accurate estimation of the angular deflection of level.
In one embodiment, optical lens 32 can be modified with increase and join the data volume in Bayes's calculating.Through the etching line in the surface of optical lens 32, the light that is throwed can become with rule from simple line segment X and has cross-hatched line segment at interval.This can provide two kinds of improvement.At first, catch pixel file from the cross-hatched light that is reflected and will have the curve fitting that more data can be used for confirming the center of said line.Secondly, the distance between any two cross hatches can be used for limiting the end points of oval line segment.Since the distance when light is projected on the surperficial parallel plane surface with acquisition equipment 28 between any two line segments be known as light the radius (r) of second connection element 14 that projected, so can be used to calculate the distance (d) that leaves second connection element 14 and to the left or to the right skew in specific field of view to the measurement of horizontal range.
In one embodiment, control device 24 can be provided for the indication of corrective action, to compensate any journal offset at least in part.For example, control device 24 can provide information or the suggest corrective action on behalf relevant with corrective action, for example at least one angle or linear change in location in first and second connection elements 12,14.
Although described the preferred embodiments of the present invention, can under the situation of the scope that does not break away from accompanying claims, add and improve and revise at this.

Claims (20)

1. axially aligned method of first and second connection elements (12,14) that is used for making rotating component (10) comprises:
Settle said rotating component (10) with first orientation;
Towards said second connection element (14) guiding first signal section, make said first signal section be reflected from sender unit (26) from said second connection element (14);
Catch first image with image capture apparatus (28), said first image comprises at least a portion of said second connection element (14) and first signal section that is reflected;
Settle said rotating component (10) with second orientation;
Towards said second connection element (14) guiding secondary signal part, make said secondary signal part be reflected from said sender unit (26) from said second connection element (14);
Catch second image with said image capture apparatus (28), said second image comprises at least a portion of said second connection element (14) and the secondary signal part that is reflected;
At least the data set that shows the relative position of said first and second connection elements (12,14) based on said first and second image formation sheets;
Difference based in the determined said data that generated is confirmed the journal offset between said first and second connection elements (12,14).
2. method according to claim 1 is characterized in that, also comprises with in corresponding first and second orientation arrangement said sender units (26) with first and second orientations of said rotating component (10) and the said acquisition equipment (28) at least one.
3. according to each described method in the aforementioned claim; It is characterized in that, also comprise with the corresponding first and second orientation arrangement said sender units (26) with first and second orientations of said rotating component (10) and said acquisition equipment (28) both.
4. according to each described method in the aforementioned claim; It is characterized in that; Also comprise the 3rd image of catching at least a portion that comprises said second connection element (14), said the 3rd image is to be in said first orientation basically and captive under the situation that said sender unit (26) does not activate basically at said rotating component (10).
5. method according to claim 4; It is characterized in that; Also comprise the 4th image of catching at least a portion that comprises said second connection element (14), said the 4th image is to be in said second orientation basically and captive under the situation that said sender unit (26) does not activate basically at said rotating component (10).
6. method according to claim 5; It is characterized in that; At least show based on said first and second image formation sheets that the data set of the relative position of said first and second connection elements (12,14) also comprises based on the said first, second, third and the 4th image and generate said data set.
7. method according to claim 6; It is characterized in that; The data set of the relative position of generation said first and second connection elements of expression (12,14) also is included between the said first and the 3rd image and carries out by pixel between the said second and the 4th image and subtract each other.
8. according to each described method in the aforementioned claim; It is characterized in that; Also comprise at least one parameter of confirming at least one position in expression first and second line segments; Observe any variation of institute's calculating location between said first and second line segments, and confirm any linear deflection and/or journal offset between said first and second connection elements (12,14) based on observations.
9. method according to claim 8; It is characterized in that, at least one parameter of confirming at least one position in said first and second line segments of expression comprise to the point on the said line segment and the level between at least one reference point and/or vertically the quantity of pixel count.
10. method according to claim 9 is characterized in that, confirms that at least one parameter of at least one position in said first and second line segments of expression comprises the bright level of confirming at least one pixel.
11. according to each described method in the aforementioned claim, it is characterized in that, also comprise and use bayes method to improve confirming to any linear deflection between said first and second connection elements (12,14) and/or journal offset.
12. according to each described method in the aforementioned claim; It is characterized in that said second connection element of court (14) transmission first and second signals comprise generation first and second optic ellipses and said first and second oval any differences are in shape compared.
13. according to each described method in the aforementioned claim, it is characterized in that, comprise that also the indication corrective action is to compensate journal offset at least in part.
14. a measurement mechanism (22) that is used to make first and second connection elements (12, the 14) aligning that forms rotatable device (10) comprising:
Sender unit (26), it is configured to towards a plurality of signal sections of said second connection element (14) guiding to reflect said a plurality of signal sections from said second connection element (14);
Image capture apparatus (28); It is configured to catch a plurality of images in each different rotation orientation of said rotatable coupling assembly (10), and said a plurality of images comprise at least a portion of said second connection element (14) and at least some in said a plurality of signal section respectively;
In said signal generation apparatus (26) and the image capture apparatus (28) at least one is configured to and can together rotates with said coupling assembly (10);
Control device, it is configured to:
Confirm any difference between said a plurality of image; And
Confirm the journal offset between said first and second connection elements (12,14) based on determined difference.
15. measurement mechanism according to claim 14 (22); It is characterized in that; In said sender unit (26) and the said acquisition equipment (28) at least one is installed on said first connection element (12), makes said at least one of said first connection element (12) in said sender unit (26) and said acquisition equipment (28) to rotate.
16., it is characterized in that what said acquisition equipment (28) was caught the signal that is reflected becomes at least a portion of inclination angle (α) with respect to the sense of signal before being reflected according to each described measurement mechanism (22) in the claim 14 and 15.
17. according to each described measurement mechanism (22) in the claim 14 to 16, it is characterized in that said sender unit (26) is configured to send at least one optical signalling, said acquisition equipment (28) is a camera.
18., it is characterized in that also comprise optical lens (32), it is configured to catch optical signalling and optical signalling is shattered into optical plane according to each described measurement mechanism (22) among the claim 14-17.
19. measurement mechanism according to claim 18 (22) is characterized in that, the surface of said optical lens (32) has through etched cross hatch to be arranged.
20. according to each described measurement mechanism (22) among the claim 14-19; It is characterized in that said measurement mechanism (22) also comprises at least a in the accelerometer (42) that can transmit the data relevant with the rotational alignment of said rotatable coupling assembly (10) and the gyroscope (42).
CN200980157208.1A 2008-12-23 2009-12-18 Coupling alignment apparatus and method Expired - Fee Related CN102326050B (en)

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EP2376867A2 (en) 2011-10-19
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WO2010075218A2 (en) 2010-07-01
WO2010075218A3 (en) 2010-11-04
CN102326050B (en) 2013-03-06

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